Emperor Go-Saga (後嵯峨天皇 Go-Saga-tennō) (April 1, 1220 – March 17, 1272) was the 88th emperor of Japan, according to the traditional order of succession. This reign spanned the years 1242 through 1246.[1]

This 13th-century sovereign was named after the 8th-century Emperor Saga and go- (後), translates literally as "later"; and thus, he is sometimes called the "Later Emperor Saga". The Japanese word go has also been translated to mean the "second one;" and in some older sources, this emperor may be identified as "Saga, the second," or as "Saga II."

Because of the sudden death of Emperor Shijō at the age of 10, the question of succession arose. Because the expectations of the court nobility and the Bakufu conflicted, the issue was bitterly contested. Kujō Michiie and the court nobility supported Prince Tadanari (忠成王), a son of Retired Emperor Juntoku, but the shikkenHōjō Yasutoki was opposed to the sons of Juntoku because of his involvement in the Jōkyū War. Michiie instead supported Tsuchimikado's son Prince Kunihito as a neutral figure for Emperor. During these negotiations, there was a vacancy on the throne of 11 days.

1242 (Ninji 3, 10th day of the 1st month): In the 10th year of Shijō-tennō 's reign (四条天皇10年), the emperor died suddenly; and despite a dispute over who should follow him as sovereign, contemporary scholars then construed that the succession (senso)[6] was received by the second son of former Emperor Tsuchimikado.[7]

1242 (Ninji 3, 5th month): Emperor Go-Saga is said to have acceded to the throne (sokui).[8]

Kugyō(公卿?) is a collective term for the very few most powerful men attached to the court of the Emperor of Japan in pre-Meiji eras. Even during those years in which the court's actual influence outside the palace walls was minimal, the hierarchic organization persisted.

In general, this elite group included only three to four men at a time. These were hereditary courtiers whose experience and background would have brought them to the pinnacle of a life's career. During Go-Saga's reign, this apex of the Daijō-kan included:

^Taira no Muneko is from 'The Changing of the Shogun 1289: An Excerpt from Towazugatari', The Journal of the Association of Teachers of Japanese, Vol. , No. 1, Tenth Anniversary Issue, (Nov., 1972), pp. 58–65